DM74LS273WM

DM74LS273WM Datasheet

DM74LS273 8-Bit Register with Clear

Part	Datasheet
DM74LS273WM	DM74LS273WM (pdf)

Related Parts	Information
DM74LS273N	DM74LS273N

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DM74LS273 8-Bit Register with Clear DM74LS273 8-Bit Register with Clear The DM74LS273 is a high speed 8-bit register, consisting of eight D-type flip-flops with a common Clock and an asynchronous active LOW Master Reset. This device is supplied in a 20-pin package featuring inch row spacing. s Edge-triggered s 8-bit high speed register s Parallel in and out s Common clock and master reset Ordering Code: Order Number Package Number Package Description DM74LS273WM M20B 20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide DM74LS273SJ M20D 20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide DM74LS273N N20A 20-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol Connection Diagram VCC = Pin 20 GND = Pin 10 Pin Descriptions Truth Table Pin Names Clock Pulse Input Active Rising Edge Data Inputs Asynchronous Master Reset Input Active LOW Flip-Flop Outputs Inputs H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Outputs 2000 Fairchild Semiconductor Corporation DS009825 DM74LS273 Functional Description The DM74LS273 is an 8-bit parallel register with a common Clock and common Master Reset. When the MR input is LOW, the Q outputs are LOW, independent of the other inputs. Information meeting the setup and hold time requirements of the D inputs is transferred to the Q outputs on the LOW-to-HIGH transition of the clock input. Logic Diagram DM74LS273 Absolute Maximum Ratings Note 1 Supply Voltage Input Voltage Operating Free Air Temperature Range 0°C to +70°C Storage Temperature Range −65°C to +150°C Note 1 The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Recommended Operating Conditions VCC VIH VIL IOH IOL TA tS H tS L tH H tH L tW H tW L tW L tREC Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature Setup Time HIGH or LOW Dn to CP Hold Time HIGH or LOW Dn to CP Pulse Width HIGH or LOW MR Pulse Width LOW Recovery Time MR to CP Units 15 ns 20 ns Electrical Characteristics Over recommended operating free air temperature range unless otherwise noted Parameter Conditions Input Clamp Voltage VCC = Min, II = −18 mA

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DM74LS273 8-Bit Register with Clear

DM74LS273 8-Bit Register with Clear

The DM74LS273 is a high speed 8-bit register, consisting of eight D-type flip-flops with a common Clock and an asynchronous active LOW Master Reset. This device is supplied in a 20-pin package featuring inch row spacing.
s Edge-triggered s 8-bit high speed register s Parallel in and out s Common clock and master reset
Ordering Code:

Order Number Package Number

Package Description

DM74LS273WM

M20B
20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide

DM74LS273SJ

M20D
20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide

DM74LS273N

N20A
20-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbol

Connection Diagram

VCC = Pin 20 GND = Pin 10

Pin Descriptions

Truth Table

Pin Names

Clock Pulse Input Active Rising Edge

Data Inputs

Asynchronous Master Reset Input Active LOW

Flip-Flop Outputs

Inputs

H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial

Outputs
2000 Fairchild Semiconductor Corporation DS009825

DM74LS273

Functional Description

The DM74LS273 is an 8-bit parallel register with a common Clock and common Master Reset. When the MR input is LOW, the Q outputs are LOW, independent of the other inputs. Information meeting the setup and hold time requirements of the D inputs is transferred to the Q outputs on the LOW-to-HIGH transition of the clock input.

Logic Diagram

DM74LS273

Absolute Maximum Ratings Note 1

Supply Voltage

Input Voltage

Operating Free Air Temperature Range 0°C to +70°C

Storage Temperature Range
−65°C to +150°C

Note 1 The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Recommended Operating Conditions

VCC VIH VIL IOH IOL TA tS H tS L tH H tH L tW H tW L
tW L tREC

Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature Setup Time HIGH or LOW Dn to CP Hold Time HIGH or LOW Dn to CP Pulse Width HIGH or LOW

MR Pulse Width LOW Recovery Time MR to CP

Units
15 ns
20 ns

Electrical Characteristics

Over recommended operating free air temperature range unless otherwise noted

Parameter

Conditions

Input Clamp Voltage

VCC = Min, II = −18 mA

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Datasheet ID: DM74LS273WM 513790